Clock



FIG. 1 is a front perspective view of the clock from the right side;

FIG. 2 is a rear perspective view of the clock from the left side;

FIG. 3 is a top plan view of the clock;

FIG. 4 is a front elevational view of the clock;

FIG. 5 is a right side view of the clock;

FIG. 6 is a left side view of the clock;

FIG. 7 is a rear elevational view of the clock; and,

FIG. 8 is a bottom plan view of the clock.

The structure depicted by means of broken lines in FIGS. 2, 3, and 5 through 8 has been shown for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a clock, as shown and described. 